1. AN5265 pin function and the reference voltage: Pin 1: 12V - Front-level
power Pin 2: 5V - audio signal input Pin 3: 0V - mute control terminal
(high, quiet) Pin 4: 0.1V - Volume control voltage inputPin 5: 7V - filter-
side Pin 6: 7.4V-- negative feedback input Pin 7: 0V -groundPin 8: 7.5V-
output end of power amplifierPin 9: 15V - power amplifier classç